660962399 has 2 divisors, whose sum is σ = 660962400. Its totient is φ = 660962398.

The previous prime is 660962369. The next prime is 660962479. The reversal of 660962399 is 993269066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660962399 - 2⁸ = 660962143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660962369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330481199 + 330481200.

It is an arithmetic number, because the mean of its divisors is an integer number (330481200).

Almost surely, 2^660962399 is an apocalyptic number.

660962399 is a deficient number, since it is larger than the sum of its proper divisors (1).

660962399 is an equidigital number, since it uses as much as digits as its factorization.

660962399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 660962399 is about 25709.1889992664. The cubic root of 660962399 is about 871.0817560761.

The spelling of 660962399 in words is "six hundred sixty million, nine hundred sixty-two thousand, three hundred ninety-nine".